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Contract OI history

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Jan 21, 2028 EXPIRATION

O $32.50 Put

O280121P00032500

Latest saved OI157Oct 23, 2026
Last change+2vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
O $32.50 put open interest history 12 saved observations from 2026-10-02 to 2026-10-23. Exact values and changes are listed in the table below. 157780 2026-10-02: 156 OI2026-10-05: 156 OI2026-10-06: 155 OI2026-10-07: 155 OI2026-10-08: 155 OI2026-10-09: 155 OI2026-10-13: 155 OI2026-10-14: 155 OI2026-10-15: 155 OI2026-10-16: 155 OI2026-10-21: 155 OI2026-10-23: 157 OI Oct 02, 2026Oct 23, 2026

All saved dates are shown. Changes compare consecutive saved observations. Missing observations are not filled with zero.

O contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing157+2
Oct 21, 20261550
Oct 16, 20261550
Oct 15, 20261550
Oct 14, 20261550
Oct 13, 20261550
Oct 09, 20261550
Oct 08, 20261550
Oct 07, 20261550
Oct 06, 2026155-1
Oct 05, 20261560
Oct 02, 2026156No prior observation